Cannot block flows with BGP FlowSpec

[Giorgos Dimopoulos]

Hello team,

In my lab setup I have configured a BIRD v2.0.1 VM to peer with an 
ExaBGP VM via eBGP.

I'm using ExaBGP to send FlowSpec rules to BIRD. BIRD correctly lists 
the received rules when running 'show route table flowtab4' but the 
respective flows are not affected (i.e. drop traffic to a destination 
prefix).

Is this because of a configuration issue on my side or BIRD does not 
implement the required FlowSpec actions?

Thank you in advance!

Best regards,
Giorgos